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Help!! Motorola or Systron Donner Part

W

Willco

Jan 1, 1970
0
I'm looking for a custom IC marked 527 55178 it's used in a motorola
S1344AAB Frequency Counter/Auto Tune Deviation Meter.

It was Manufactured for Motorola by Systron Donner. Systron Donner's
model number was SLN6407A-75. SD also manufactured a frequency counter
model 6252. The 6252 is identical to the counter section of the 1344AAB

The chip is a counter/latch with tristate outputs. I was able to
Identify some input ie clock and output enable carry. But the other
inputs unknown.

A schematic or manual for the above equipment would help!


Jack
Willco Electronics
 
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